The 2.5-inch Model 66 is the concealed carry and detective variant of the stainless K-frame Combat Magnum, pairing the magnum capability and corrosion-resistant finish with a short barrel suitable for plainclothes and off-duty carry. Type: Revolver Action: DA/SA Caliber: .357 Mag Capacity: 6 Year introduced: 1970, USA Weight: 31 oz Overall length: 7.5" Status: Active Intended use: Carry, Duty, Backup